Past surveys that searched for open DNS resolvers.
We measured IPv6 deployment statitistics from DNS point of view, taking a 1% (1.2M names) sample of domain names in the .com, .net, and .org zones and investigating to what extent IPv6 has been deployed for key services associated with each domain.
We probed 5% of routed IPv4 space, or 70 million addresses, looking for nameservers. For those that replied, we also tried to determine their software and version.
With these surveys we send queries to 1,000,000+ zones and their authoritative nameservers looking for zones and nameservers that:
We also query a random 5% sample of routed IP addresses to look recursive resolvers and determine whether or not they openly provide service to anyone, and what software they are running.
A survey that searched for DNS cache poisoners.
© 2020 The Measurement Factory.